From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A602D1E7640; Tue, 15 Oct 2024 11:35:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728992152; cv=none; b=Bz1T0Y8f2EtfOLO3DRPJpkGd/CwC0pMr/SvlfFmi2q9MEzhoXAxOdVCUbsWzfCWtyVoq8YkUshVSdrrbnCSPg7zrqy8S4hfFYXx8ovD8/vYqB+ZF6npjjovEotxY+Ik776frrKWU0NQ4ju9Jvy07dX3w19LnQMJz5lYTnRadOfA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728992152; c=relaxed/simple; bh=uAxf0fMjCRNDRBdJytFEh82R5sRxvUuOCp4J+AaY9VI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oHFq0M0zMm0UBatUuiGBdP2FwrRkIsfzJo0ezlE8jOi1hXjW7BFoPX8fMkBx1SC9eh5bpYmb8hXyAtD3eEcndVwt8zxVnd+e2pCkURAGQ0cd21cHpUyWHEOISscZ0GAGj6KdD1h2fO0l6bD7iyQdyvWHHjZALCTQRrrI5KCtjaw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rnF5JgGk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rnF5JgGk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5BB8C4CEC6; Tue, 15 Oct 2024 11:35:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728992152; bh=uAxf0fMjCRNDRBdJytFEh82R5sRxvUuOCp4J+AaY9VI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rnF5JgGkNVLMAZlls+39l60yhF8QUfJC8304ovunY4kZ1SjL/9dalMX5DVl9cUd+d 7nwy/+4A8X0YH0X7PicTHHxJjrJJDrtvHsL8xdy/VcpUvx+Q2L326rxNsZUCkTBKFD Zg1e6dbKO5aiYHWb7guYx553shAUve5BwqMdMDKQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Richard Narron , Hans de Goede , Lorenzo Stoakes , Linus Torvalds Subject: [PATCH 5.15 033/691] minmax: reduce min/max macro expansion in atomisp driver Date: Tue, 15 Oct 2024 13:19:41 +0200 Message-ID: <20241015112441.651031602@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015112440.309539031@linuxfoundation.org> References: <20241015112440.309539031@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lorenzo Stoakes commit 7c6a3a65ace70f12b27b1a27c9a69cb791dc6e91 upstream. Avoid unnecessary nested min()/max() which results in egregious macro expansion. Use clamp_t() as this introduces the least possible expansion, and turn the {s,u}DIGIT_FITTING() macros into inline functions to avoid the nested expansion. This resolves an issue with slackware 15.0 32-bit compilation as reported by Richard Narron. Presumably the min/max fixups would be difficult to backport, this patch should be easier and fix's Richard's problem in 5.15. Reported-by: Richard Narron Reviewed-by: Hans de Goede Closes: https://lore.kernel.org/all/4a5321bd-b1f-1832-f0c-cea8694dc5aa@aaazen.com/ Fixes: 867046cc7027 ("minmax: relax check to allow comparison between unsigned arguments and signed constants") Cc: stable@vger.kernel.org Signed-off-by: Lorenzo Stoakes Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- drivers/staging/media/atomisp/pci/sh_css_frac.h | 26 +++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) --- a/drivers/staging/media/atomisp/pci/sh_css_frac.h +++ b/drivers/staging/media/atomisp/pci/sh_css_frac.h @@ -30,12 +30,24 @@ #define uISP_VAL_MAX ((unsigned int)((1 << uISP_REG_BIT) - 1)) /* a:fraction bits for 16bit precision, b:fraction bits for ISP precision */ -#define sDIGIT_FITTING(v, a, b) \ - min_t(int, max_t(int, (((v) >> sSHIFT) >> max(sFRACTION_BITS_FITTING(a) - (b), 0)), \ - sISP_VAL_MIN), sISP_VAL_MAX) -#define uDIGIT_FITTING(v, a, b) \ - min((unsigned int)max((unsigned)(((v) >> uSHIFT) \ - >> max((int)(uFRACTION_BITS_FITTING(a) - (b)), 0)), \ - uISP_VAL_MIN), uISP_VAL_MAX) +static inline int sDIGIT_FITTING(int v, int a, int b) +{ + int fit_shift = sFRACTION_BITS_FITTING(a) - b; + + v >>= sSHIFT; + v >>= fit_shift > 0 ? fit_shift : 0; + + return clamp_t(int, v, sISP_VAL_MIN, sISP_VAL_MAX); +} + +static inline unsigned int uDIGIT_FITTING(unsigned int v, int a, int b) +{ + int fit_shift = uFRACTION_BITS_FITTING(a) - b; + + v >>= uSHIFT; + v >>= fit_shift > 0 ? fit_shift : 0; + + return clamp_t(unsigned int, v, uISP_VAL_MIN, uISP_VAL_MAX); +} #endif /* __SH_CSS_FRAC_H */